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The Face-Centered Cubic (FCC) unit cell can be imagined as a cube with an atom on each corner, and an atom on each face. It is one of the most common structures for metals. FCC has 4 atoms per unit cell, lattice constant a = 2R√2, Coordination Number CN = 12, and Atomic Packing Factor APF = 74%.
A face-centered cubic solid has atoms at the corners and, as the name implies, at the centers of the faces of its unit cells. Atoms in an FCC arrangement are packed as closely together as possible, with atoms occupying 74% of the volume. This structure is also called cubic closest packing (CCP).
Face-centered cubic (FCC) and body-centered cubic (BCC) are two of the most iconic crystal structures. Nearly all elements have FCC, BCC, or HCP structures. You might think that–because FCC and BCC are cubic–they are much more similar than HCP.
The face-centered cubic lattice (cF) has lattice points on the faces of the cube, that each gives exactly one half contribution, in addition to the corner lattice points, giving a total of 4 lattice points per unit cell (1⁄8 × 8 from the corners plus 1⁄2 × 6 from the faces).
This crystal structure is known as face-centered cubic and has atoms at each corner of the cube and six atoms at each face of the cube. It is shown in the figure below. This structure, as well as the next structure we are going to discuss, has the atoms packed as tightly as theoretically possible.
In the Body Centered Cubic Cell (BCC) there is an additional atom in the center of the cube, and in the face centered cubic cell, an atom is shared between two unit cells along the face. Please watch the YouTube video as this can help a lot.
Face-centered Cubic (FCC) unit cells indicate where the lattice points are at both corners and on each face of the cell. This is a more common type of unit cell since the atoms are more tightly packed than that of a Simple Cubic unit cell.
A Face Centered Cubic Unit Cell. Cu atoms pack with a face centered cubic structure, also known as cubic closest packing.
00:00 Introducing the bcc and fcc Structures02:06 The Body-centered Cubic Structure05:09 The Face-centered Cubic Structure07:21 Cubic Closest Packing08:02 He...
As the name itself suggests, the face centred cubic structure has a cube-shaped unit cell. The length of each edge is given by the lattice parameter ‘a’. There is a lattice point at each corner of the cube, which marks the position of the atoms. This is similar to the simple cubic structure.